Hello. First time posting on here. I have used the forums for malware/trojan removal guides in the past.
Today I have started to experience issues with my system. It started early afternoon where my computer randomly turned off while I was watching a movie on my USB hard drive. It completely just shut down like if you were holding the power button down for a hard boot. 2-3 seconds later it started back up. I started unplugging extra peripherals thinking a USB port was causing a short. This did not help. The shutdown time is not consistent either. Sometimes it will be 20 min after the last one where it shuts down again. Another time it's maybe 5 minutes. It also varies what I am doing too. It shut down on me watching a live stream on Twitch using Chrome. I have not done any upgrades to my system other than add an internal hard drive a couple months ago. I go into the system event and there is nothing to show.
My specs are as follows. Some of the items are carryovers from prior system builds.
Win 7 64 bit
Core i7 2700k (stock speed)
Corsair H60 watercooler (one of the closed loop, self contained ones)
Asus p8z58 deluxe/gen 3
Siverstone 600w PSU (only carryover item from my last PC).
Samsung 128gb 830 series (os drive)
2tb WD storage drive
Two Seagate USB 3 external drives
Two Dell monitors
Pioneer Blu-Ray Burner
Creative X-Fi sound card
I do not overclock my system. I checked all the connections and nothing was loose. I have my system and peripherals plugged into an APC battery backup that handles up to 700w of power. I ran SMART tests and disk checks for errors. The OS drive was fine. The short tests for the external drives were fine.
What should I be looking for to help diagnose my issue? Thanks for any assistance.